Finding the Fourth Proportional to 72,915.75, 100,623.74 and 39,381.75
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Solution
The fourth proportional to 72,915.75, 100,623.74 and 39,381.75 is: 54,346.82
Step by Step Solution
- Step 1: Write the proportion equation
72,915.75 : 100,623.74 = 39,381.75 : x - Step 2: Convert to fraction form
72,915.75/100,623.74 = 39,381.75/x - Step 3: Cross multiply
72,915.75x = 100,623.74 × 39,381.75 - Step 4: Simplify right side
72,915.75x = 3,962,738,972.75 - Step 5: Solve for x
x = 3,962,738,972.75/72,915.75 - Step 6: Final answer
x = 54,346.82
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.